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Biology HL Portfolio

The Cell and Cell Theory

[pic]

The cell

The word cell comes from the Latin word “cellula�, which means a small room. The cell is the smallest unit of a living organism, also known as “the building block of life�. Every living organism is consisted of a cell. There are bacteria (unicellular organisms), and multicellular organisms. There are different types of cells, prokaryotic and eukaryotic cells. All cells come from preexisting cells. “Every cell is self-maintaining; it takes in nutrients, converts them into energy, carries out special functions and reproduces itself if necessary.� The descriptive name for the smallest living biological structure was given by Robert Hooke in a book, which he published in 1665, while discovering “small units� in a cork. After that the research of the cell has progressed greatly.

Cell structure
[pic]

http://sun.menloschool.org/~cweaver/cells/e/nucleus/cellpic.jpg

Prokaryotic and......

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Approximate Word Count: 2318
Approximate Pages: 10 (250 words per double-spaced page)

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